Bonus Benefit for this tool: If you don't know what side angle your ski/board is set to, this tool can help you find them. Before you start mark the side edge with a sharpie, start the tool at the lowest angle and see if it removes the marking on your edge. Raise the angle step-wise and repeat until it removes the mark. That is your angle! Record the angle for future reference.

One Gumi or Gummi Stone, may be gray or red, for prepping an edge, deburring as the final step in edge sharpening, or detuning. Also great for edge rust removal.

Routine sharpening is done from the side edge only. A base edge bevel is not included. Base work is less frequent and typically only at one angle (1 degree). A single angle tool at the angle of your choice would be a good compliment to this kit.